implement

Implement the work described in an issue or task.

Arguments

• issue: Issue ID (e.g., Linear identifier like CAR-123) or path to a local plan .md file — required
• --autonomous: run inside the built-in bounded loop — iterate implement→verify until the acceptance criteria and tests pass, or the cap (3) is reached, then escalate. Off by default (a single pass).

Steps

1. Read the issue or task file.
   • If a Linear ID is provided and Linear MCP tools are available, read the Linear issue.
   • If the issue has a parent, read it for broader context and design decisions.
   • If a local .md path is provided, read that file.
   • If a matching Claude Code Task exists (find it via TaskList), read it with TaskGet for the latest state and dependencies.
2. Mark work as started:
   • If Linear is available, set the issue status to "In Progress".
   • If a Claude Code Task tracks this work, TaskUpdate it to in_progress. This is what makes the work resumable across sessions (see /resume).
3. Implement the changes described in the issue, following the acceptance criteria.
4. Mark work complete:
   • TaskUpdate the Claude Code Task to completed only when the work is fully done (no failing checks, no partial implementation). If blocked, keep it in_progress and note the blocker.
   • If Linear is available, advance the issue status per your team's flow.
5. After implementation, present a summary of what was changed and which files were touched.

Autonomous mode (--autonomous)

When --autonomous is set, wrap steps 3–4 in the bounded convergence loop (the same cap-3 mechanism /run Phase 4 uses):

1. Implement the changes.
2. Verify in a separate verifier subagent (never self-verify — see the rule in run.md): run the project's tests and /review-code against the diff; collect failures/findings.
3. Clean → mark the task completed and stop. Not clean → fix and repeat from step 1.
4. Cap: 3 iterations. If failures remain after 3, escalate: stop, summarize what's blocking and the fixes attempted each iteration, and hand back. Never mark the task completed past unresolved failures, and never auto-push.

Sensitive work still runs /secure and stops at the final commit/push approval. Without --autonomous, do a single pass (steps 1–5 above) and stop.

Notes

• Follow all project conventions from CLAUDE.md or similar project documentation.
• Only make changes described in the issue. Keep solutions simple and focused.
• If the issue description is ambiguous or missing information, ask the user before writing code.